Got oil changed on 97 Silverado about 3 weeks ago and a tranny flush about 2 weeks ago. Oil pressure gage went to 0 a couple days ago. I had unplugged a few wires then plugged them back in and it went back to its normal. Two days later it went back down to 0 and today I started it and it died no more than a minute later. Any ideas?
So you now have to determine/test if the oil pressure gauge was zero due to the gauge itself you has no oil pressure due to low oil or a faulty oil pump. Any if the truck was driven a long distance with no oil pressure, you would have cooked the engine. Keep us posted.
It could also be a failed oil sending unit, the gauge itself, or grounding issue. I would suspect those things as well if you find your pump to be functional.
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